Home / 100,986.77-139,355.38-55,662.25

Finding the Fourth Proportional to 100,986.77, 139,355.38 and 55,662.25

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Solution

The fourth proportional to 100,986.77, 139,355.38 and 55,662.25 is: 76,810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.77 : 139,355.38 = 55,662.25 : x
  2. Step 2: Convert to fraction form
    100,986.77/139,355.38 = 55,662.25/x
  3. Step 3: Cross multiply
    100,986.77x = 139,355.38 × 55,662.25
  4. Step 4: Simplify right side
    100,986.77x = 7,756,834,000.41
  5. Step 5: Solve for x
    x = 7,756,834,000.41/100,986.77
  6. Step 6: Final answer
    x = 76,810.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.